Valve-grinding tool.



1. M. STRYHA'L. VALVE GRINDING TOOL. APPLICATION FILED 'JULY 28. i916.

PatentedvNov. 2S, 1916.

' 3mm/woz Mse/MMM 32225/92613/ dem@ veran JOSEPH VI. vES'JLRYHAL, OF WASHINGTON, DISTRCT OF COLUMBIA. I

VALVE-Gaiarin@ roer..

. Specication of Letters Patent.

Patented Nov. 28, 1916.

Application led July 28, 1916. Serial No. 111,885.'

To all whomy t may concern.'

Be it known that I, JOSEPH M. STRYHAL, a

citizen ofthe United States, residing at 4sary oscillatory movements to a valve to grind the same against the valve seat, said tool embodying in connection with a suitable stock or shank and handle, a valve engaging head shiftable or adapted to rock in relation to said stock or shank so as to maintain the proper engagement between the valve engaging head and the4 valve during the grinding operation.

A Vfurther object of the invention is to provide in connection therewith the valve engaging head and the shank or stock, yieldable means exerting a constant pressure against the valve engaging head and also serving to' vildingly sustain the same in axial alinement with the shankor stock.

With the above and other objects in View, the invention consists in the novel construction,- combination 'and arrangement, herein fllly described, illustrated and claimed. y In the accompanying drawing: Figure 1 is a side elevation of the valve grinding tool. Fig. 2 is a fragmentary side elevation thereof taken at a right angle to Fig. l,A Fig. 3 is a fragmentary vertical section through the tool show-ing the relation between the shank and the valve/engaging head. Fig. 4 is a cross section-on the line 4-4 of Fig. 3.

The valve-grinding tool contemplated in thisinvention comprises a shank 1, the upper end portion of which is milled to form a hand grip 2. At the hase of the milled portion or hand gij/ip there is arranged a hand guard 3 in the form oit an annular Hange to prevent the hands of the operator from -moving downwardly as he oscillates the shank 1 by placing his hands upon opposite sides of 'the hand grip 2 and moving his hands alternately in opposite directions.

The lower end portion of the shank 1 is reduced in diameter as shown at 4 thereby forming a shoulder 5 for one extremity of a coiled expansion spring 6, the latter encircling the reduced portion et of the shank. A washer l is preferably interposed between the'shoulder 5and the adjacent end of the spring 6. Adjacent toits lower extremity the reduced portion al of the shank is formed with an opening 8 extending transversely thereto and having its opposite ends i'lared or bell-shaped as shown in Figs. 3 and 4,

said opening 8 receiving a pin 9 of less diameter than the opening 8, said pin 9 extendmg transversely. through a valve engaging head1() and serving to couple the head to the shank.

The head 10 is formed with a bore or f, socket 11 to receive the reducedend portion recess 12 to 4receive the lower extremity ofv the spring 6. Projecting from `the bottom of the head 1Q is valve engaging means, the

same being shown for convenience as consisting of a plurality of pins orbits 13 arranged in spaced. relation to each other and adapted to engage corresponding pockets in the valve body asv will be readily understood by those familiar with the art to which this invention appertains.

From the foregoing description taken in connection with the accompanying drawings it will now be understood that the valve engaging head has a' rocking or wabbling movement in relation to the shank and handle and therefor if the said shank and handle are not held in true axial alinement with the head, the operation of the valve grinding tool will not be interfered with as the head may remain in perfect working engagement with the valve body. The spring exerts a pressure against the valve engaging head so as to cause the pin 9 to normally bear against the bottom wall of the opening 8 but yields to permit the top wall vof said opening to hear downwardly against the pin 9 thereby enabling any desired pressure to be brought to bear against the head. Said spring also serves to center the shank in relation to the head or in other words said spring serves to yieldingly sustain the shank in axial alinement with the head thereby greatly facilitating the grinding operation. Furthermore, by reason of the pin 9 being smaller than the opening 8, a limited amount of relative axial movement between the shank head is .permitted causing the 110' loo shank to give a quick start to the valve engaging head in ease the 'valve should have a tendency to adhere to the valve seat.

I do not desire to be restricted to the details and proportions illustrated in the dravvmembers, and the opening in the other member being of considerably greater diameter than the pin to allow of a limited relative axial turning movement between .the shank yand head..

2. A valve grinding tool Comprising, in combination, an operating shank formed with an opening extending transversely therethrough and having the ends thereof flared, a valve engaging head having a borein which the end portion of the shank has a loose Wabbling lit, a pin extending through said opening and of smaller diameter than said opening and serving to connect the head to the shank-and yieldable means between the head ar1d'sl1ank.`

n testimony whereof l affix my signature.

JOSEPH M. STRYHAL. 

